implement this the right way by searching for the "default" property over

implement this the right way by searching for the "default" property over

2004-01-26  Chris Toshok  <toshok@ximian.com>

	* libebook/e-book.c (e_book_get_default_addressbook): implement
	this the right way by searching for the "default" property over
	all sources, and returning that source, or the local addressbook
	if there isn't a default source.
	(e_book_set_default_addressbook): new function.
	(e_book_set_default_source): new function.

	* libebook/e-book.h: add prototypes for
	e_book_set_default_addressbook/e_book_set_default_source.